Anhemitonic scale

Musicology commonly classifies note scales as either hemitonic or anhemitonic. Hemitonic scales contain one or more semitones and anhemitonic scales do not contain semitones. For example, in Japanese music the anhemitonic yo scale is contrasted with the hemitonic in scale. The simplest scale in most common use over the planet, the atritonic anhemitonic ("Major") pentatonic scale, is anhemitonic, so also the whole tone scale.